This interactive visualization describes how climatologists obtain and interpret evidence from the Greenland Ice Sheet in an effort to piece together a picture of Earth's distant climate history. Resource describes how glaciers form and how they can be used to collect ancient atmospheric data. The issues analyzed in the data collection are particularly good in showing how science is done in the field.

This narrated slide show gives a brief overview of coral biology and how coral reefs are in danger from pollution, ocean temperature change, ocean acidification, and climate change. In addition, scientists discuss how taking cores from corals yields information on past changes in ocean temperature.

In this video, a PhD Student from the University of Maine explains how ice cores are used to study global climate change.

June 24, 2020

Not a Mad Lib! Our blogger lays out some of the evidence for and against the notion that volcanic eruptions can trigger El Niño. 

close up photo of a cross-section of a tree, showing growth rings
November 29, 2018

Tree rings can reveal the age of wood used to make human artifacts from famous violins to the cliff ruins of Mesa Verde, and also tell us about the climate conditions that prevailed when those trees were alive. 

This static graph of changes in CO2 concentrations goes back 400,000 years, showing the dramatic spike in recent years.

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